Combined door lock and ajar hook



Sept 7, 1943- H. G. VOIGHT 2,329;017

COMBINED DOOR LOCK AND AJAR HOOK Filed Jan. 1, 1942 2 Sheets-Sheet 2 Patented Sept. 7, 1943 Henry G. Voi'ghfiNeW Haven, Conn; assignorto sargentycompa ny', New Haven, Gonn.) =1- cofnotation of Connecticut Application Januaryl, 1942, Serial- Nil-25,331

15 Claims.

This invention relatestodoor locks, and more particularly to a combined; door lock and so.- calledflajar hook/f or adevicei for nermittinglzth'e' door to, swing to partly open position but me.

venting it from further opening.

.Inconnection with outside doors andldbors to rooms or apartmentslmechanism: has sometimes been employed. to permit the occupant to open the door to a. limited extent, while at the same time'preventing anyone on the outside from forcing; the door to a further open position so" that outsider Thatiis when the doors fastener was M set or. engaged, it could only be d-isengaged bya person: upon theinsi'de of the room; and henceanyoneseeking to enter from the'o'utsid'e must be admitted by one upon theinsitle.

" results in considerable inconvenience, particularly in connection withship cabifidoors; for example, where'the cabin has-more-than one occupant. In such caseit is d'esi rableto provide for the opening o-fthe door from theontsidby a proper key, regardless of the position (if-"the door-fastening means, so that one occupantof' same time-the other occupantmay-admit himself by meansof a key without disti i-rbing thefirst occupant. i (one object of the present invention-is to pro vide ct -combined door lock and door fastener 01 aj'an hook of novel form and construction:

A- still further objectof theihventio-ni's to provide a combined door lock and door fastener-such that the fastening means may be releasedfifom the outside of the-door by means of a proper key. A' still further object of'theinvention topro vide-a combined door lock and deter fastener which will be simple in' construction an opera-' tiori, so that the door may beopened if'tom either side hereof 'inthe-ordinary manner.

provision ar a combined lool z and :coer fastener i the cabin may-set the fastening devices and at wherein the fastening means may be disengaged by the turning of the inside knob inthe usual manner to openthe door, soth'at theoccupant of the room in case of emergencywouldn'ot have to resort to any unusual operations to obtain an exit from the room. 1

To these and other ends the invention consists in the novel features-and combinations of parts to be hereinafter described and claimed.-

In the drawings:

Fig; 1 is afront elevational-view-of acembined door lock" and fastener -mechanism embodying my invention; the cover of the lock case being removed to show theinterior mechanism;

Fig. 2 is a similar View of a portion; of the lock mechanism, the partsbeing shownin another position; l

Fig. 3 is a view similar to-Fig; 2-, showing the door fastening' bolt; at the beginning of its retracting'movement;

Fig; 4 is a face view of the door strike and fastener element;

outer end. of

v invention I have shown a door lock comprising 1 a-casing l0" having mounted therein. a. lock cylinder ll of usualform, having arotatablerollback- 12. comprising a bolthea'd l3 and stem ld 'g-uidedby lugs l5'on; the case, and normally urged to-pro-' tractedposition by spring Hit At there'ar end engaged-by the lower end of a latcheretracting lever [8, the lever having a boss I9 adapted to be engaged by the rollback l2,.so' that the latch may be key-operated from the outside of the door. l i

In the casing, is also mounted" a-lignedhubs-ifl, only one *ofiwhich is shown, which hubs' are adapted-tote operated'by themsual-doors knobs: It will be understood, however, that this particular case the outerhub is dogged against rotation; an arm 21 beinglsecured to"t11e"hub}rrthe end of whichdsforked-to engage a-lug zz secured tothe case. Theiniier'hub' 21] carries a-rollbach 23 adapted to engage lugsN carried" at'the rear end of a latch-retracting element or yoke 2:5z-the upper lug '24" being designed: to engage the rlower portion of thecrosshead l'ftowithdraw theda-tch' bolt. It willbe understoodtthat the yokeit norl mally urged to forward-position by'ith'e spring" 26. The .p'arts's'o far described are moi-"cor less of The casing also containsa latch bolt its upper end, as shown at 32.

usual form in door locks made at the present time wherein the latch bolt is operated from the inside by means of a knob and from the outside by means of a key.

lower portion 29 is pivoted a slotted element iii? having an elongated slot 3!- slightly enlarged at The element 36 is pivoted to the strike plate by a suitable fastoning element such as the screw 33, so that it may swing from the full-line position shown in Fig. 4 to the dotted line position" shown in that figure, or even to a further position wherein it stands at right angles to the original position along the strike plate. It will be noted that the screw 34 at the lower portion of the strike plate merely secures the latter to the door jamb and is not engaged with the element 30. It will also be noted that the element 30 stands directly below the portion 28 of the strike plate, or within the vertical outline of this portion, so that the face of the element 30 is substantially flush with the face of the element 28.

The portion 28 of the strike plate is provided with the usual latch opening 35 to receive the bolt l3, while the lower portion of the plate is provided with a recess 36. This ecess is relatively deep, as shown in Fig. l, and as shown in Figs. i and opens outwardly through the inner edge of this portion of the strike plate, for a reason to be hereinafter set forth.

In the lower part of the lock case is slidably mounted an auxiliary bolt or ajar hook bolt 371', this member being guided in its reciprocatory movements by means of a slot formed therein at 38 and a pin 39 carried by the lock case. This bolt has a rounded end portion 66 adapted to be protracted from the lock case, and inthis portionis a latch member 4! pivoted at 42 and having lugs 43 and 44 at its front and rear ends, respectively. It will be noted that the latch member is o-verweighted at the forward or lefthand side of the pivot 62, as shown in Figs. 1 and 6, for example, so that when the bolt 3'! is retracted the forward end of thi latch will the bolt 31 is thrown or protracted, as shown in Fig. 2, to be engaged by the lower surface of a laterally extending member 59 at the lower end of a slide bar 80. This slide bar Bil is movably mounted in the lock case, and at its upper end is provided with a laterally extending portion El designed to be engaged by the rollback l2. It may here be stated that when it is desired to operate the latch-retracting member l8 by the key from the outside of the door, the key is turned in one direction to engage the rollback !2 with the lug [9, while if it is desired to operate the slide bar 60, the rollback is turned in the other direction. It will also be noted that while the slide bar stands in its lower position, as shown in Fig. 1, when the bolt 3'! is retracted in the inoperative position within the lock case, this member will be raised to an upper position when the bolt 31 is protracted, a shown in Figs. 2 and 3.

A lug 62 projects upwardly from the bolt 31 and carries a laterally projecting pin 63. This pinis designed to be engaged in an open-ended and elongated slot 64 in the lower end of a Walking beam 65, pivoted to the case at 66. This walking beam is provided at its upper end with a pin 6! standing in an elongated slot 68 provided in a lug 69 secured at the rear end of the head E3 of the latch bolt. As will be explained hereinafter, the latch bolt may be freely moved without affecting the door-fastening bolt 37 if the latter is in retracted position. The

connecting of the bolts by the walking beam drop downwardly so that the lug 43 will stand substantially flush with the upper surface of the portion 46. However, when the bolt is protracted the lug i l at the tail of the latch member will engage the face plate-45 of the lock case and swing the latch element to the position shown in Fig. 6, wherein the lug 43 protrudes upwardly from the slot in the bolt in which it normally stands.

A hubtl is rotatably mounted in the lower portion of the lock case and designated to be rotated by any suitable means such as a thumb turn, for example. To this hub is secured a rollback 48 which is pivoted to alink 49 at so, the other end of this link being pivoted at 5! to the tail 52 of the bolt 31. It will be noted that the members 48 and. 59 form an operating toggle for the bolt 31. A tension spring 53 secured to a post 54 on the case at one end, and to a post 55 on the tail 52 at the-other end, normally tends to urge the bolt 37 to its retracted or inoperative position.

Also secured to the hub 61 is an arm '56 adapted I to stand in engagement with an arm Won the yoke 25 when the bolt 31 is protracted, as shown in Figs. 2 and 3. A second arm 58 is also secured to the hub M, which arm is adapted when provides that both bolts cannot be protracted at the same time, and the protraction of the fastening bolt will move the latch bolt rearwardly to its inoperative position.

The operation of the device will now be described. With the parts in the position shown in Fig. 1, the lock will operate as an ordinary door lock in that the latch bolt [3 may be freely operated either by the knob from the inside or by the key from the outside, without having any effect upon the fastening bolt 31. It will be understood that when the latch bolt is retracted the lower end of the walking beam merely moves out of engagement with the pin 63, as will be permitted by the open-ended slot 64, and the latch bolt will normally be urged to protracted position by the spring It.

If, however, the occupant of the room wishes to place the door fastening means or ajar hook in operation, the hub 41 is turned in an anticlockwise direction, as shown in Figs. 1 to 3, thus straightening the toggle links 48 and 49 and protracting the fastening bolt 31. This bolt is thrown outwardly through the front plate 45 of the'lock case and through the upper enlarged portion32 of the slot 3| of the swinging element 30, the end'of the bolt entering the open-ended recess 36 in the strike plate 29. As the bolt 3'! approaches its fully protracted position, the tail 44 on the latch member 4| strikes against the face of the lock case and throws the element 43 outwardly to prevent its disengagement from the slot 30. This movement, it will be understood, through the walking beam retracts the latch bolt l3, as shown in Fig. 2. The door may now be swung to partly open position, the element 30 swinging from its full-line position shown in Fig. 4 to or beyond its dotted line position shown in that figure, about the pivot element 33, and the rounded head 40 of the fastening bolt riding outwardly in the slot 31, as far as is permitted by the length of-this slot and the length of the element 30, Thev door will bethus. restrained a ainst further openin and it w ll be impossible pant. of the room. may retract the bolt '3] by. urnin n a lockwise dire t n the hub .41.

When this is done h sprin 6 will mmediately prot actthe latch bolt 13. and the lower port on.

oi the walkin be m 65 wi l follow he pin 6.3,, t m y be n t d hat t isoh y ne ss r turn he hub 41 to a u o ehtexteht to-break. the t le formed y the l ks $311 .21. 4 and e raction o the ol 1 wil be efi c e l b the sp ing ea. The o t w of ur e, e hel n protracted pos on a ainst he action o t e series by the to le embers, as shown in llig. 2..

Howev if h c pa t i h s. o. a e e room, and particularly in case of haste or panic, need onl o at he o r k s e Would norma l do, thus rota ing. the r back 2 re ttaetlihe h ok 25. an cau ing e part 5 of this yo e to heese, the m 56. thus ro at ng the. hub 47 and breaking the toggle-to permit the bolt 31 to be retracted by its spring. Also, if a person onthe outside desires to enter and is in. possession of the, proper key, he may retract he. bol 31: by otat ng the o b k n a c ckw se d ect n s sh hF h s eprest illf th slidebar. 60 and rotating the hub byh eeh of; he en a m t of the part 59 with the arm 58 rigidly secured to the hub 41. Thus, when the fastening bolt is protracted, it

. .may be retracted eitherbyturningthe inside knob or. by a key from the outside, and, of course, may also be retracted from. the inside by ro hating the hub 41 by means of the thumb, turn attached thereto.

Itwill also be seen that when the fastening bolt 3;! is in retracted position the latch bolt operates in the normal manner without interfering with the position of the fastening bolt, in that the walking beam simply oscillates idly without moving the bolt 3'1. However, when the fastening bolt 3] is protracted, the latch bolt'is always withdrawn, and whenthe bolt 31 is retracted the latch bolt immediately be urged to protracted position by its spring, unless the bolt 31; is retracted by, the turning of the knob, in

which case the retraction of the yoke. will also insure the retraction of the latch bolt '13. so that anoccupant of the room may retract both bolts e., the turning or the by the one operation, 1. inside knob.

It will also be observed that the fastening bolt 31 may be withdrawn from the swinging element in any position of the latter. That is, even while the door is ajar this bolt may be withdrawn, for example, by the key from the outside, it being understood that the portion 40 of the fastening bolt is circular in cross section and is of a diameter to slide freely in the slot 3|. As soon as the tail 44 of the latch member 4| no longer contacts the face 45, this latch member will drop to its normal position, in which the top of the lug 43 is flush with the outer surface of the part 4!! of the bolt, so that, while it is impossible to spring the swinging element 30 away from the bolt portion 40, the bolt may be withdrawn at any time, even when the door stands ajar, by the mechanism shown.

While I have shown anddescribed a preferred embodiment of my invention, it will be understood that it is not tobe limited to all of the details shown, but is capable of modification and variation within, the spirit of: theinvention and within the scope of the claims. 1 7

What I claim is: I 1. A.- door lock comprising a case, a latch bolt reciprocably mounted therein and adapted to.

cooperate with astrike plate, a second bolt ele-. ment reciprocably mounted in thecase, a slotted element mounted on the door lamb with which. said second bolt cooperates to limit movement of the doorto partly open position, means for protracting said second bolt, said slotted element being pivoted to the strike plate at apoint below:

said first bolt, and spring means toretract said second bolt.

2. A door lock comprising'a case, a bolt reh oabl mo nt d th r in and ad dt operate witha strike plate, a second bolt ele;

ment reciprocably mountedin the case. a. slotted element mounted on the door jamb with which, said second bolt cooperates to limit movement of the door to partly open position, means for protracting said second bolt, and a single knob means at the inside of the door fornetracting bothof said bolts. l

3. A door'lock comprising a case, a bolt reciprocably mounted therein and adapted to co? operate with a strike plate a second bolt element.

reciprocablymounted in the case, a slotted elementrnounted on the door jamb with which said. secondbolt cooperatesto limit mcvementof the door to partly open position, means. connecting said bolts to effect retraction of one thereof when theother is protracted, and means for protracting and retracting said bolts.

4, A door lock comprising a case, a bolt reciprocably mounted therein and adapt-ed'to co}.

operate with a strike plate, asecond bolt element reciprocably mounted'inthe case, a slotted element mounted on the door jamb with which said second bolt cooperates to limit movement, of the door. to partly open position, means conne t,- ing said bolts to effect retraction of one thereof r when the other is protracted, and means for protracting and retracting said bolts, said connecting means between the bolts permitting nqrinal operation of tinefirst bolt when the second is retracted." l

5. A door lock comprising a case, a bolt reciprocably mounted therein and adapted to cooperate with a strike plateya second bolt element reciprocably mounted in the case, aslotted element mounted on the. door lamb with which said secondbolt cooperates to limit movement f e doorr of par l o eh-nosition, m ansror P 7 ot eeti e fiei i 9l n l a We lne. eam connected at its ends to said bolts respectively whereby the protraction of the second bolt effects retraction of the first bolt. 6. A door lock comprising a case, a bolt reciprocably-mounted therein and adapted to cooperate with a strike plate, a second bolt element reciprocably mounted in the case, a slotted element mounted on the door jamb with which said second bolt cooperates to limit movement of the door to partly open position, means for protracting said second bolt, and a walking beam connected at its ends to said bolts respectively whereby the protraction of the second bolt effects retraction of the first bolt, said walking beam having a one-way connection with one of said bolts.

7. A door lock comprising a case, a. bolt reciprocably mounted therein and adapted to cooperate with a strike plate, a second bolt element reciprocably mounted in the case, a slotted element mounted on the door jamb, with which said second bolt cooperates to limit movement of the door to partly open position, means for protracting said second bolt, and key-operated means for operating both bolts,-said key operated means being rotated in one direction to effect operation of one bolt and in the opposite direction for efiecting operation of the other bolt.

8. A door lock comprising a case, -a bolt reciprocably mounted therein and adapted to cooperate with a strike plate, a second bolt element reciprocably mounted in the case, a slotted element mounted on the door jamb with which said second bolt cooperates to limit movement of the door to partly open position, means for protracting said second'bolt, a Walking beam connected at its ends to said bolts respectively whereby the protraction of the second bolt elfects retraction of the first bolt, and a knob at the inside of the door to effect retraction of both said bolts upon rotation in either direction.

9. A door lock comprising a case, a bolt reciprocably mounted therein and adapted to cooperate with a strike plate, a second bolt element reciprocably mounted in the case, a slotted element mounted on the door jamb with which said second bolt cooperates to limit movement of the door to partly open position, means for protracting said second bolt, a walking beam connected at its ends to said bolts respectively whereby the protraction of the second bolt effect retraction of the first bolt, 8. bolt-retracting member in the case, knob means at the inside of the door to actuate said member, and said member serving toretract both of said bolts.

10. A door lock comprising a case, a bolt reciprocably mounted therein and adapted to cooperate with a strike plate, a second bolt element reciprocably mounted in the case, a'slotted element mounted on the door jamb with which said second bolt cooperates 'to limit-movement of the door to partly open position, means for protracting said second bolt, means to actuate said second bolt, said means including a toggle arranged to hold said bolt in protracted position, and spring means to retract said bolt when said toggle is broken.

11. A door lock comprising a case having a latch bolt therein adapted to cooperate with a strike plate, an auxiliary bolt, a pivotallymounted member carried by said strike plate to cooperate with said auxiliary bolt, and means to simultaneously protract said auxiliary bolt and retract said latch 'bolt, said means permitting protractionand retraction of the latch bolt when the auxiliary bolt is in retracted position without movement of the latter bolt.

12. A door lock comprising a case having a protraction and retraction of the latch bolt while the auxiliary bolt is in retracted position.

13. In a door holder, acase adapted to be mounted on the door, having a latch bolt and an auxiliary bolt reciprocably mounted therein, means swingingly mounted-on the door jamb to cooperate with said auxiliary bolt to hold the door in partly open position, said bolts being interconnected whereby the latch bolt is retracted when the auxiliary bolt is protracted, and means for protracting said auxiliary bolt.

14; A door fastening dvicecomprising a casing adapted to be mounted upon the door, a beveled latch bolt reciprocably mounted in the casing, a strike plate mounted upon the door jamb having a slotted elementpivotally carried thereby, an auxiliary bolt reciprocably mounted in the casing and adaptedwhen projected to enter said slot to limit movement of the door to partly open position, means movably mounted on said auxiliary bolt to engage said element and normally prevent disengagement therebetween when the door is in said partly open position and the auxiliary bolt is projected, and means for retracting said auxiliary bolt into the casing in any position of the door.

1 5. A door fastening device comprising acasing adapted to be mounted upon the door, a beveled latch bolt reciprocably mounted in the casing, a strike plate mounted upon the door jamb having a slotted element pivotally carried thereby, an auxiliary bolt reciproc'ably mounted in the casing and adapted when projected to enter said slot to limit movement of the door to partly open position, means movably mounted on said auxiliary bolt to engage said element and nor: mally prevent disengagement therebetween when the door is in said partly open position and the auxiliary bolt is projected, and key-operated means for retracting said auxiliary bolt into the casing in any position of the door.

HENRY G. voIGH'r. 

